An update:
In the interests of national security, there will be only one authorized
map of the United States effective June 1, 2015. The north orientation has
been rotated to mislead terrorists and/or hostile governments. All other
maps of the United States, both government publications and private
publications, will become classified on that date and unavailable.
See http://www.enchantedlearning.com/usa/outlinemaps/nostates/
Howard Stone, Map Cataloger, Brown University